Furnace-front.



No. 805,186. PATENTED NOV. 21, 1905. J. BISHOP.

FURNACE FRONT.

APPLIOATION FILED JAN.31,1905.

3 SHEETS-SHEET 1.

WITNESSES: INVENTOR And/mm No. 805,186. PATENTED NOV. 21, 1905. J BISHOPFURNACE FRONT.

APIPLIOATION FILED JAN. 31, 1905.-

3 SHEETS-SHEET 2.

INVENTOR znBz'sZz BY m w m w No. 805,186. PATENTED NOV. 21, 1905. J.BISHOP.

FURNACE FRONT.

APPLICATION FILED JAN. 31, 1905.

3 SHEETS-SHEET 3. 7.55

WITNESSES: INVENTOR M Jfin z'sjzga 7 a 7 BY A TTOHN E Y 8 JOHN BISHOP,OF BARTOW, FLORIDA.

FURNACE-FRONT.

Specification of Letters Patent.

Patented Nov. 21, 1905.

Application filed January 31, 1905. Serial No. 243,499.

To ail whom it may concern.-

-Be it known that 1, JOHN BISHOP, a citizen of the United States, and aresident of Bartow, in the county of Polk an State of Florida, haveinvented a new and Improved Furnace- Front, of which the following is afull, clear, and exact description.

This invention relates to furnace-fronts; and

its object is to improve the construction of taken substantially uponthe line 2 2 of Fig.

1. Fig. 3 is also a horizontal section taken substantially upon the line3 3 of Fig. 1. .This section passes through the fire-door, as willappear. Fig. 4 is a vertical section taken substantially upon the line 44 of Fig. 1. Fig. 5 is a horizontal section through the furnacefrontshown in Fig. 6 and passing through the fire-doors, and Fig. 6 is afront elevation showing the construction as applied to wide furnaceswith double doors.

' Referring more particularly to the parts, 1 represents the forwardwall ofa furnace, which furnace may be of any common construction. Justto the rear of the forward wall 1 ahearth 2 is provided, which supportsthe forward extremities of longitudinally -disposed gratebars 3. Asindicated most clearly in Fig. 3, the wall 1 is provided, preferablycentrally, with an opening that is to be closed by a door 4, theconstruction of which will be described more fully hereinafter. rangednear the inner portion of the wall, so that the inner face 5 of the wallis substantially flush with the inner face of the firedoor. Furthermore,the inner face 5 referred to is curved, as shown in Fig. 3, on eitherside of the doorway, so as to form a horizontal arch having its crown atthe doorway, the base of the arch intersecting the side walls 6 of thefurnace at an obtuse angle, as shown. At the aforesaid doorway theforward wall is formed with forwardly-diverging cheeks 7, as shown.Substantially the entire area of the wall 1 is covered by a face-plate8, the body The fire-door 4 is arof which is secured in position bymeans of suitable bolts 9 or similar devices. This faceplate 8 conformssubstantially to the configuration of the wall, as illustrated in Fig.3, presenting inclined side plates or jambs 10, which lie against theaforesaid cheeks 7. The inner edges 11 of these side plates lie adjacentto the inner face 5 of the forward wall and are preferably beveled, asshown, so that they are substantially protected from exposure to theheat of the fire. This construction of the doorway and forward wall ofthe furnace renders the fire-bed very accessible and facilitates theoperation of slice-bars and other fire-tools. By reason of thewidely-diverging doorway the spaces at the sides and at the front of thefire-bed become readily accessible. The horizontal-arch constructionconstitutes a substantial reinforcement for the front of the furnace,tending to resist wear and tear due to the slamming of the furnace-door.

The fact that the furnace-wall does not project inwardly beyond thedoorway is advantageous, as in operating the fire-tools they are likelyto strike against the edges of the projecting parts, so as to dislodgethe fire-brick lining.

The face-plate 8 also has an upper transverse member or lintel 12, andthe body of this lintel, as indicated in Fig. 4, is inclined andpreferably is provided with a horizontal lower extension 13. work of theopening substantially conforms at this part to the peculiar formation ofthe face-plate. This lintel operates to support the brickwork 14 abovethe same, as will be readily understood.

Beneath the fire-door 4 the side plates 10 are connected by face-strips15 16, the same being separated. as shown, in order to receive anash-door 17 therebetween. The fire-door 4 consists of a hollow platepresenting a waterchamber 18, as shown. The edge of the plate above thiswater-chamber is provided with perforations 19 for the purpose ofenabling evaporation to the outer air. The door at a suitable point isprovided with a handle 20, which consists of a vertically-disposed pipehaving a flaring upper mouth 21, the said handle being closed at itslower extremity. This tubular handle is in communication with thewater-chamber 18 through hollow thimbles or pipe connections 22.

In order to supply the water-chamber 18 and the interior of the handle20 with water, 1 provide a water-pipe 23, which passes into Asindicated, the brick-' the front wall of the furnace, preferably fromthe side, as shown. This pipe passes through the lower portion of thebrickwork 14 and terminates at 24, which is the point vertically abovethe open mouth 21, as shown in Fig. 4:- A valve 25 controls thewater-supply through this pipe and would be normally regulated, so thata small quantity of water would constantly drip down into the tubularhandle, replenishing the loss of water due to evaporation. In practicethe amount of water supplied in this manner should be slightly in excessof that evaporated. The water not evaporated would then overflow at theupper edge of the mouth 21 and pass downwardly upon the outer surface ofthe handle, helping to keep the same cool, as will be readilyunderstood. At the lower portion of the lire-door 4 a drain-cock 26 isarranged as indicated. The door may be mounted in any suitable manner,such as by hinges 27, as shown, and a catch 28 will be provided formaintaining the door in a closed position.

As shown most clearly in Fig. 3, the side edges of the door are beveled,so as to conform to the direction of the side plates 10, lying snuglyagainst their outer faces, as will be readily understood.

The lintel l2 constitutes a support for the bricks above the doorway anddispenses with the necessity for an arch over the doorway. At the sametime the lintel is protected on account of its position from the heat ofthe fire, and this prevents any tendencies for it to collapse under thecontinued effect of the weight and heat. For this reason the inven tionis especially useful in connection with the wide doorways which are sofavorably regarded by furnacemen. Normally these doors necessitate awide span for the arch, and this disadvantage operates against theirmore general use.

A furnacefront constructed substantially as described possesses manyother advantages over the furnace-fronts of ordinary construction. Theseadvantages relate especially to the horizontal-arch constructionreferred to above, which facilitates the care of the fire. The-fact thatthe fire-door 4 is water-jacketed is also highly advantageous, as itprevents the door from becoming highly heated and warping out of shape.

In Fig. 5 a wide furnace-front is illustrated, the wall being providedwith an opening 27, closed by double doors 28, hingedat 29 to the jambs30. These doors have water-jackets 31, which would be independentlysupplied with water through tubular handles 32 in communication with thewater-chambers, as before described. The lintel 33 affords ample supportfor the brickwork 84 thereabove in the manner before described.

The manner described for feeding the water to the doors is consideredespecially desirable. In the methods heretofore employed the feedconnections have usually been made at the hinge-joints and were leakyand likely to get out of order. WVith my arrangement these defects arereadily overcome.

I/Vhile the furnace-front described is aconstruction especially adaptedfor use in connection with a drier-furnace, evidently the invention maybe used in connection with furnaces for boilers or for other purposes.

Havingthus described myinvention, I claim as new and desire to secure byLetters Patent 1. A water-jacketed fire-door having a hollow handle incommunication with the waterspace within said fire-door.

2. A fire-door for a furnace presenting a water-chamber, a hollow handlein communication with said chamber and presenting an opening adapted toreceive water to replenish the supply within said chamber, and means forallowing water to drip through said opening.

3. A fire-door for a furnace having a waterchamber, a substantiallyvertical tubular handle attached to the outer face of said door, andpresenting an opening, tubular thimbles connecting said handle with thewater-chamber of said door, and means for supplying water to saidopening.

Li. A furnace-front having a lintel supporting the brickwork thereabove,said lintel presenting a lower face exposed to the atmosphere, and aire-door at the inner edge of said lintel, and protecting the same fromthe fire-heat.

5. A furnace-front having a wall with an opening therethrough, a lintelsupporting said wall above said opening, and a door substantially flushwith the inner edge of said lintel and protecting the same from thefire-heat.

6. A furnace-front having a wall with an opening therethrough, a lintelsupporting the said wall above said opening, said wall projecting overthe inner edge of said lintel to screen the same, and a fire-doorsubstantially flush with the inner edge of said lintel, said fire-dooraffording means for screening the under side of said lintel from thefire-heat.

7. A furnace-front having a wall built of blocks such as bricks, laid inthe form of a curve disposed in a substantially horizontal plane andwidening toward the side walls of the furnace.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JOHN BISHOP.

Witnesses:

- IV. D. DENI-IAM, G. O. DENHAM.

IIS

